2007-02-20 05:18:37 · 10 answers · asked by Anonymous in Pets ➔ Fish
They don't really sleep like we do, but what passes for sleep to them they do at night, just like most animals.
MM
2007-02-20 05:23:55 · answer #1 · answered by magicman116 7 · 0⤊ 0⤋
Sleep means different things to different forms of animal life, however, sleep is defined as "a period of rest during which volition and consciousness are in partial or complete abeyance and the bodily functions partially suspended; a behavioral state marked by characteristic immobile posture and diminished, but readily reversible sensitivity to external stimuli." Most animals have some daily pattern of rest and activity and, in many species, these daily cycles are similar to people running around during the day then lying down at night and doing nothing or sleeping. It is believed that fish are no different, although it is a controversial subject. Some fish keep very still, experiencing a quiet period (quiescence) that you might call sleep. Scuba divers often handle reef fish in the middle of the night without startling them and can even lift some species out of the water before they "awaken." Tropical freshwater fish in home aquaria appear to be resting immediately after turning the lights on in a room that has been darkened for several hours. So, if you define "sleep" in this term, diurnal fish (fish who are active during the day) sleep at night and nocturnal fish (fish who are active at night) sleep during the day. Unfortunately, fish have no eyelids, so absent this obviously slowed movement or reaction time, it is difficult to tell whether they are asleep or not.
2007-02-20 13:30:28 · answer #2 · answered by Venice Girl 6 · 0⤊ 0⤋
Fish sleep when they are tired although it may not seem like they are sleeping to you. Most fish (or all fish I'm not sure) kind of stop swimming in the water and just stay still but if a piece of food goes past them they will automatically chase it. So it's like they are half asleep.
2007-02-20 17:00:25 · answer #3 · answered by kool aid man. 4 · 0⤊ 0⤋
I always see my fish swimming around, I would like to know when they sleep to.
2007-02-20 13:38:34 · answer #4 · answered by ? 2 · 0⤊ 0⤋
They sleep half their brain at a time.
2007-02-20 13:23:56 · answer #5 · answered by allyalexmch 6 · 0⤊ 0⤋
when they get tired.
they sleep on the sea bed.
2007-02-20 13:22:31 · answer #6 · answered by peter p 2 · 0⤊ 0⤋
fish dont sleep ......they rest .
2007-02-20 13:23:09 · answer #7 · answered by friendly** 1 · 0⤊ 0⤋
when do you sleep?
2007-02-20 13:30:38 · answer #8 · answered by =Matt= 3 · 0⤊ 0⤋
http://www.newton.dep.anl.gov/askasci/bio99/bio99047.htm
maybe this site will help you
i am not sure but this site helps explain a little
2007-02-20 13:24:49 · answer #9 · answered by maskedwhitewolf 2 · 0⤊ 0⤋
It depends what shift they are working.
Chris.
2007-02-23 15:36:02 · answer #10 · answered by GOD 6 · 0⤊ 0⤋